Phonograph



Sept. 21 1926.

J. scHLUTTER PHoNoGRAPH Filed Sept. '10. 192,5

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PEONOGRAPH.

.lppliationfiledy September 10, 1925. Serial N o. 55,462,

This invention has reference to a phonograph by which sound is reproduced and transmitted from the record through the turntable to a diaphragm, amplified by a vibratory member in the nature of a sounding board, and then broadcast laterally from 'beneath the latter in all directions.

lThe general object of the invention is tov provide a device which will reproduce and amplify the Vsound without affecting its quality, or distorting the soundwaves, and without the accompaniment of any scratching noise.

In phonographs as usually constructed, the record rests `on a turntable, which has a substantially rigid support, while the stylus is supported on a spring arm, and the tone arm and stylus have a comparatively free movement, independent of the vibrations of the diaphragm. In my construction, the stylus is carried by a comparatively stiff arm, while the ydiaphragm holder is rigidly secured to a rotatable support, andthe turntable on which therecord rests is resiliently supported by said rotatable support above the diaphragm, and is free to move up and down or sidewise so as to lessen the friction between the record and the stylus, thereby eliminating the scratching noise, while the reproduced sound waves are transmitted through the diaphragm and underneath an annular amplifier or sounding board, and

are broadcast laterally from` all sides.

rlhe specific construction ofthe inventionand the principles of its Aoperation will be more clearly understood from the following detailed description taken in connection with the accompanying drawing, which illustrates one embodiment thereof.

In the drawing;` v

Figure l is a central vertical section ,of the invention.

Figure 2 is a section taken approximately on the line 2-2 of Figure l, parts of the record and turntable being broken away in order to better show the construction.

As shownv in the drawing, the invention may be mounted within a suitable cabinet 5, havingla hinged lid 6. Nithin the cabinet is a shelf 7, beneathwhich is secured the .motor 8 having a shaft 9, which projects upwardly through the shelf. A cup-shaped member 10 is secured to the shaft 9, and a circular plate or table 11, of cast ironv or similar material, is supported by means of an annular Yflange 12, which rests on the rim of the .cup-shaped member f 10. The center of the platell is formed with adownwardly projecting boss or socket 13, havingy a diametric slot 14 adapted` to receive a pin'.y 15, which is disposed"transversely Aof the, shaft 9 and causes the plate to rotate there'- with.

The upper surface ofV the platel 11- 'is' i formed Vwith three or. more upwardly yprojecting lugs 16 to which` is secured nular amplifying disk or sounding board, preferably composed of fiber. Vdiaphragm holder 18 is disposed within theamplifying disk 17, and is formed with downwardly projecting lugs or feet 19 which are secured to the plate 11. A. diaphragm 2O issecured within thel holder 18 between lan inwardly projecting'flange 21 and a. removable an nular plate 22..

A turntable 23, preferably of aluminum, is secured to lugs 24 formedat the outer ends of spider arms 25, which are resiliently sup-` ported'by coil springs26 yfrom the plate 1,1. The spidery formedwith a. central hub 27, which is connected to the center of the i diaphragm .2O by apin 28. The turntable 23 is formed withv a central upwardly projecting stud 29,- which fits. into theh'ole in the record 30, andthe upper portionof the turntable is provided with a felt V.jl'facing 51l on which therecord rests.v i

A ped'estalj32 is secured to the shelf 7 at. one side of the plate 11f,.and is providedat its upper' end with a pivot stud 33 on which4 an arm Sais mounted. Arms 35 are mounted for vertical swinging .movement onV the Vouter end of the arm Stand carry a head.

35 in which the stylus 37 -is secured.

` From the foregoing description, it willbe noted that the stylus is not supported by a spring arm., but vis nevertheless free to follow the groove in the` record, while the record itself isresiliently supported, andis free to move up and down or sidewise, sopas to lessen the lfriction between thefstylus and. the record, and toeliminate the scratching noise which would otherwise loe-developed.` rlhe r-eproducedvsound waves, causedf'by the vibration of the record asthe stylus travels along the groovearetransmitted through the turntable23-and spider arms 25 to the diaphragm 20. From the diaphragm, thek sound waves pass outwardly beneath the amplifying disk 17, and arefbroadcast. laterallyL from all` sides without interference,- like the ywaves produced-by. dropping a i,p'eb;

vquality ofthe tone.

are emitted, for the most part, in one direction, while with the present construction,

the sound is-broadcast from all sides equally without distortion or interference.

While l have shown and described in detail the construction which is at present deemed the most suitable for the purpose, it is obvious that many modihcations maT be made-therein withoutany material departure from the essential 'features or the invention as expressed inthe appended claims.

Y lVha-t is claimed is:

l. In a phonograph, a rotatable horizontally disposed plate, a turntable supported above and in spaced relation to the `pla-te, a diaphragm between the turntable and plate, and means for transmitting vibrations from a` record ,carried by the turntable to said diaphragm. i p n l Q. ln a phonograph, a rotatable horizontally disposed plate, a diaphragm holder secured to the upper sideot the plate, a diaphragm in said holder, a turntable resiliently supported from said plate above the diaphragm, and means connecting the turntable tothe diaphragm. l

ln a phonograph, a rotatable horizontally4 disposed plate, a turntable supported above andin spaced relation to the plate, a diaphragm between the turntable and plate, and a spider secured 'to the-under 'side Vof the turntable and having a central hub 'connected to the diaphragm.

y 1i. ln a phonograph, a rotatable horizontally disposed plate, a turntable supported above and in spaced relation to the plate, a Vdiaphragm holder between the turntable and plate, a diaphragm secured. in said holder, means for transmitting vibrations Jfrom a record carried by the turntable to the diaphragm, and an annular ampli'icying disk surrounding` the diaphragm holder and spaced from said plate.

Y In a phonograph, a rotatable horizontally disposed plate, a diaphragm holder secured to the upper side of the plate, a diaphragm secured in said holder, a turntable resiliently supported by said plate above the diaphragm, means connecting the turntable to the diaphragm, andan annular amplifying dislr surrounding the diaphragm holder and spaced r trom said plate;

6. In a phonograph, a rotatable horizontally disposed plate, a turntable supported above and in spaced relation to the plate, a diaphragm holder between the turntable 'and plate, a diaphragm secured wit-hin the holder, a spiderrsecured to the turntable and Vhaving a central hub connected to the ing upwardly from the plate outside` of theY diaphraginholder, and an annular ampli- 'tying dish L .I s l' C to the upper race oi said plate.

b. in a phonograph, a rotatable horizon- Vtally disposed plate, a diaphragm holder having te t secured to the upper side of so that the holder is spaced theresaid plate trom, a

holder, a spider having a centralhub connected to the diaphragm and having radial arms, coil springs underneath said arms for supporting the spide from said plate, a

'turntable secured tojand supported byv the,

vouter endsI oi'itlie spider arms', lugs projecting upwardly :''iom the plate outside of the d aphragm holder, and an annular amplifying disk secured on said lugs and parallel to the upper face of said plate.

9. ln a phonograph, a rotatable horizontally disposed plate, a diaphragm holder having t'eet secured to the upper sidev of said plate so that the holder is spaced therefrom, a diaphragm secured'within said' holder, a spider resiliently supported by the plate above the diaphragm and having a central hub connectedA with said diaphragm, upwardlyA disposedV lugs at the outer relation tothe spider,fand an annular amplifying disl: surrounding the diaphragm holder and spaced `from said plate.

' l0. ln va pl'ionograph, a motor having an upwardly projecting vertical shalt, a cupshaped meinberseeured to the shaft, a pin` see red transversely of the upper end ol"- the shaft, a plate havingv a central downwardly projecting socket receiving the end Asecured on said lugs and parallel diaphragm securedV Within saidr ends ot the arms, a vturntable sup-'i por ed by and secured to said lugs in spaced of the shaft and provided with a diametrie i slot'tor receiving said pin, an annulel flange formed on the vunderl side of said plate and adapted to'rest on the rim of the cup-shaped Amember, a diaphragm holder supported by said'plate and containing a diaphragm, turntable supported by said plate above the diaphragm, and means for transmitting vibrations from a record carried by the turntable to said diaphragm.

In testimon Y that l claim the forefroinff as my own, l have hereto aliixed my signature. I

JOHN soHLUrTna. 

